Convert uses of double-serialization to {En,De}codeDouble

1 files changed, 14 insertions, 6 deletions

diff --git a/src/test/fuzz/float.cpp b/src/test/fuzz/float.cpp
index f806c82d14..e95d593b22 100644
--- a/src/test/fuzz/float.cpp
+++ b/src/test/fuzz/float.cpp
@@ -7,10 +7,13 @@
 #include <streams.h>
 #include <test/fuzz/FuzzedDataProvider.h>
 #include <test/fuzz/fuzz.h>
+#include <util/serfloat.h>
 #include <version.h>
 
 #include <cassert>
 #include <cstdint>
+#include <cmath>
+#include <limits>
 
 FUZZ_TARGET(float)
 {
@@ -19,12 +22,17 @@ FUZZ_TARGET(float)
     {
         const double d = fuzzed_data_provider.ConsumeFloatingPoint<double>();
         (void)memusage::DynamicUsage(d);
-        assert(ser_uint64_to_double(ser_double_to_uint64(d)) == d);
 
-        CDataStream stream(SER_NETWORK, INIT_PROTO_VERSION);
-        stream << d;
-        double d_deserialized;
-        stream >> d_deserialized;
-        assert(d == d_deserialized);
+        uint64_t encoded = EncodeDouble(d);
+        if constexpr (std::numeric_limits<double>::is_iec559) {
+            if (!std::isnan(d)) {
+                uint64_t encoded_in_memory;
+                std::copy((const unsigned char*)&d, (const unsigned char*)(&d + 1), (unsigned char*)&encoded_in_memory);
+                assert(encoded_in_memory == encoded);
+            }
+        }
+        double d_deserialized = DecodeDouble(encoded);
+        assert(std::isnan(d) == std::isnan(d_deserialized));
+        assert(std::isnan(d) || d == d_deserialized);
     }
 }